UPDATE: Monday's NASCAR Cup Series Brickyard 400, which was postponed from Sunday due to rain, delivered 1.24 million viewers on NBCSN. Last year's race, which ran as scheduled in July, had 5.63 million on the NBC broadcast network.
Earlier in the day, the delayed Xfinity Series race from the same track had 474,000.
--- Sports Media Watch ---
Original post 9-13-2018:
Indianapolis TV Ratings. https://twitter.com/A_S12/status/1040309232518799360— Adam Stern (@A_S12) September 13, 2018